Improvement in safety hoisting-cages



UNITED STATES PATENT MAXIMILIAN MHLIG, OF FALKENAU ON THE EGER, AUSTRIA.

IMPROVEMENT IN SAFETY HOlSTING-CAGES.

I Specification forming part of Letters Patent No. 173,325, dated February 8, 1876; application filed -Y January 22, 1576.

To all whom fit may concern Be it known that I, MAXIMiLIAN MHLIG, of Falkenau on the Eger, Austria, have invented a Safety Apparatus for Oagesfor Hoisting, of which the following is a specification:

This safety apparatus is represented on the annexed sheet of drawings in four different views. Figure I is au elevation partly in section, according to line A B of Fig. III, while the latter is a plan, with section at() l), of Fig. I. These two views show the apparatus in action, while Figs. II and IV represent the same out of action.

A isthe top part of the frame on the one side of the cage, the other frame (not shown in the drawing) being, of course, alike. YThis part is, bypreference, made of cast-iron. On the same are cast two ribs, b b, inclined to the conter line, or to the guide-post L. B B are two pieces keyed on the shafts a a. To vthe centers of the latter the levers g g are xed, whiolrare connected to the cross-head of the suspension-rod by the barsff. The suspension-rod is providedwith two nuts and a disk, e. The spring d, placed into a cavity of the top beam of the cage, serves to press the suspension-rod down, in case of breakage of the rope. as usual. This spring, however, may be vmade of any other design. C C are two balls or rollers, which I vprefer to make of an elastic substance, such as india rubber or leather, with a core of metal; but they may be lnade out of any other suitable material.

So l'ong as the cage is suspended by the rope, its weight bears against the spring d, and presses the saine so far together that the top beam rests on the disk e, as shown in Fig. 1I. The cross-head of the suspensiomrod at the same time has drawn the rod f, and, cousequently, the levers g, upward, so that the pieces B allow the balls or rollers C to remain at a certain distance from the guide-post L, so as not to hinder the upward or downward motion of the cage in any manner. The balls C are prevented from dropping out of their place by the stops o o.

mechanism in such a manner as to cause the same to assume the position of Figs. I and III, so that the pieces B B press the balls-G G against the guide-post. The point m, Fig. II, of B, comes into contact with the point n of the inclined rib b, forming thereby a continuous inclined surface for the balls to roll ou. The cage, immediately upon the breakage of the rope, assuming a downward motion will cause the balls() to roll between the guide-post and the ribs b. The latter being inclined the balls will gradually be pressed together, slackening the downward speed ot' the cage in proportion, until they are fully jammed, and the cage is stopped.

By these means a sudden stoppage of the cage, which may easily cause a breakage of the same, is avoided; but if it should be considered advantageous, a strong spring, y, may yet be fixed to the rib b, as shown in Fig. II,

for the purpose of taking up any inal jerk Y which may occur at the momentzof stopping'.

With cages of large dimensions, two suoli safety apparatuses coupled with each other may be used, and in ease two guide-posts are applied the apparatus may be arranged between. these.

I claim as my invention- The combination of the inclines b, the balls and rollers C,- and the pieces B or their equivalent, in a safety apparatus, acted upon through suitable interm ediatemechanism, as described7 by a spring, d, as and for the purpose specifled.

-In testimony whereof I have signed my name to this specitication in the presence of two subscribing witnesses.

MAX. MHLIG.

Witnesses LoUIs MELIG, ROBERT R. SCHMIDT. 

